path: root/arch/arm/plat-omap/include/syslink/hw_mbox.h

/*
 * hw_mbox.h
 *
 * Syslink driver support for OMAP Processors.
 *
 *  Copyright (C) 2008-2009 Texas Instruments, Inc.
 *
 *  This package is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 *  IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 *  WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE.
 */

#ifndef __MBOX_H
#define __MBOX_H

#include <syslink/hw_defs.h>


#define HW_MBOX_INT_NEW_MSG    0x1
#define HW_MBOX_INT_NOT_FULL   0x2
#define HW_MBOX_INT_ALL        0x3

/*
 * DEFINITION:   HW_MBOX_MAX_NUM_MESSAGES
 *
 * DESCRIPTION:  Maximum number of messages that mailbox can hald at a time.
 *
 *
 */

#define HW_MBOX_MAX_NUM_MESSAGES   4


	/* width in bits of MBOX Id */
#define HW_MBOX_ID_WIDTH           2


/*
 * TYPE:         enum hw_mbox_id_t
 *
 * DESCRIPTION:  Enumerated Type used to specify Mail Box Sub Module Id Number
 *
 *
 */
	enum hw_mbox_id_t {
		HW_MBOX_ID_0,
		HW_MBOX_ID_1,
		HW_MBOX_ID_2,
		HW_MBOX_ID_3,
		HW_MBOX_ID_4,
		HW_MBOX_ID_5
	};

/*
 * TYPE:         enum hw_mbox_userid_t
 *
 * DESCRIPTION:  Enumerated Type used to specify Mail box User Id
 *
 *
 */
	enum hw_mbox_userid_t {
		HW_MBOX_U0_ARM11,
		HW_MBOX_U1_UMA,
		HW_MBOX_U2_IVA,
		HW_MBOX_U3_ARM11
	};

#if defined(OMAP3430)
/*
* TYPE:         mailbox_context
*
* DESCRIPTION:  Mailbox context settings
*
*
*/
struct mailbox_context {
	unsigned long sysconfig;
	unsigned long irqEnable0;
	unsigned long irqEnable1;
};
#endif/* defined(OMAP3430)*/

/*
* FUNCTION      : hw_mbox_msg_read
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to read
*
* OUTPUTS:
*
*   Identifier  : p_read_value
*   Type        : unsigned long *const
*   Description : Value read from MailBox
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Invalid Id used
*   RET_EMPTY           Mailbox empty
*
* PURPOSE:
*     : this function reads a unsigned long from the sub module message
*     box Specified. if there are no messages in the mailbox
*    then and error is returned.
*
*/
extern long hw_mbox_msg_read(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		unsigned long *const p_read_value
	);

/*
* FUNCTION      : hw_mbox_msg_write
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to write
*
*   Identifier  : write_value
*   Type        : const unsigned long
*   Description : Value to write to MailBox
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Invalid Id used
*
* PURPOSE:: this function writes a unsigned long from the sub module message
*           box Specified.
*
*
*/
extern long hw_mbox_msg_write(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		const unsigned long write_value
	);

/*
* FUNCTION      : hw_mbox_is_full
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to check
*
* OUTPUTS:
*
*   Identifier  : p_is_full
*   Type        : unsigned long *const
*   Description : false means mail box not Full
*                 true means mailbox full.
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Invalid Id used
*
* PURPOSE:      : this function reads the full status register for mailbox.
*
*
*/
extern long hw_mbox_is_full(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		unsigned long *const p_is_full
	);

/* -----------------------------------------------------------------
* FUNCTION      : hw_mbox_nomsg_get
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to get num messages
*
* OUTPUTS:
*
*   Identifier  : p_num_msg
*   Type        : unsigned long *const
*   Description : Number of messages in mailbox
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Inavlid ID input at parameter
*
* PURPOSE:
*    : this function gets number of messages in a specified mailbox.
*
*
*/
extern long hw_mbox_nomsg_get(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		unsigned long *const p_num_msg
	);

/*
* FUNCTION      : hw_mbox_event_enable
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to enable
*
*   Identifier  : user_id
*   Type        : const enum hw_mbox_userid_t
*   Description : Mail box User Id to enable
*
*   Identifier  : enableIrq
*   Type        : const unsigned long
*   Description : Irq value to enable
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*    RET_BAD_NULL_PARAM  A Pointer Paramater was set to NULL
*    RET_INVALID_ID      Invalid Id used
*
* PURPOSE:      : this function enables the specified IRQ.
*
*
*/
extern long hw_mbox_event_enable(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		const enum hw_mbox_userid_t user_id,
		const unsigned long events
	);

/*
* FUNCTION      : hw_mbox_event_disable
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*  RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to disable
*
*   Identifier  : user_id
*   Type        : const enum hw_mbox_userid_t
*   Description : Mail box User Id to disable
*
*   Identifier  : enableIrq
*   Type        : const unsigned long
*   Description : Irq value to disable
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*                 RET_BAD_NULL_PARAM  A Pointer Paramater was set to NULL
*                 RET_INVALID_ID      Invalid Id used
*
* PURPOSE:      : this function disables the specified IRQ.
*
*
*/
extern long hw_mbox_event_disable(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		const enum hw_mbox_userid_t user_id,
		const unsigned long events
	);

/*
* FUNCTION      : hw_mbox_event_status
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to clear
*
*   Identifier  : user_id
*   Type        : const enum hw_mbox_userid_t
*   Description : Mail box User Id to clear
*
* OUTPUTS:
*
*   Identifier  : pIrqStatus
*   Type        : pMBOX_Int_t *const
*   Description : The value in IRQ status register
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Invalid Id used
*
* PURPOSE:      : this function gets the status of the specified IRQ.
*
*
*/
extern long hw_mbox_event_status(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		const enum hw_mbox_userid_t user_id,
		unsigned long *const p_eventStatus
	);

/*
* FUNCTION      : hw_mbox_event_ack
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*   Identifier  : mail_box_id
*   Type        : const enum hw_mbox_id_t
*   Description : Mail Box Sub module Id to set
*
*   Identifier  : user_id
*   Type        : const enum hw_mbox_userid_t
*   Description : Mail box User Id to set
*
*   Identifier  : irqStatus
*   Type        : const unsigned long
*   Description : The value to write IRQ status
*
* OUTPUTS:
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*                 RET_BAD_NULL_PARAM  Address Paramater was set to 0
*                 RET_INVALID_ID      Invalid Id used
*
* PURPOSE:      : this function sets the status of the specified IRQ.
*
*
*/
extern long hw_mbox_event_ack(
		const unsigned long base_address,
		const enum hw_mbox_id_t mail_box_id,
		const enum hw_mbox_userid_t user_id,
		const unsigned long event
	);

#if defined(OMAP3430)
/* ---------------------------------------------------------------
* FUNCTION      : hw_mbox_save_settings
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Invalid Id used
*    RET_EMPTY           Mailbox empty
*
* PURPOSE:      : this function saves the context of mailbox
*
* ----------------------------------------------------------------
*/
extern long hw_mbox_save_settings(unsigned long baseAddres);

/*
* FUNCTION      : hw_mbox_restore_settings
*
* INPUTS:
*
*   Identifier  : base_address
*   Type        : const unsigned long
*   Description : Base Address of instance of Mailbox module
*
*
* RETURNS:
*
*   Type        : ReturnCode_t
*   Description : RET_OK              No errors occured
*   RET_BAD_NULL_PARAM  Address/pointer Paramater was set to 0/NULL
*   RET_INVALID_ID      Invalid Id used
*   RET_EMPTY           Mailbox empty
*
* PURPOSE:      : this function restores the context of mailbox
*
*
*/
extern long hw_mbox_restore_settings(unsigned long baseAddres);
#endif/* defined(OMAP3430)*/

#endif  /* __MBOX_H */